Respuesta :
A voltaic cell with Ni/Ni²⁺ and Co/Co²⁺ half-cells has the following initial concentrations are-
Reaction at anode
[tex]Co (s)[/tex]→ [tex]Co ^{2+} +2e^{-}[/tex] E° = 0.277V
Reaction at cathode
[tex]Ni^{2+ } + 2e^{-}[/tex]→ [tex]Ni(s)[/tex] E° = -0.22 V
E°= -0.23 + 0.277
E°= 0.047 V
Ecell = E°cell - [tex]\frac{0.0257}{2}[/tex] ln [tex]\frac{0.20}{0.80}[/tex]
= 0.047 + 0.0178
= 0.0648 V
What is voltaic cell ?
A voltaic cell is an electrochemical device that harnesses the power of a chemical process to generate electricity. A voltaic cell's key components are: A place where oxidation takes place on an electrode is the anode. Reduction takes place at the cathode electrode.
Galvanic cells are also sometimes referred to as voltaic or Daniell cells. The standard household battery is one type of galvanic cell.
To learn more about E°cell visit: https://brainly.com/question/10203847
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